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FREDERICK J. AUSTIN, OF NEW YORK, N. Y.

HAND :PRINTING-PRESS.

Specification of Letters Patent No. 41, 4dated October 8, 1836.

To all whom it may concern Be it known that I, FREDERICK J. AUSTIN, ofthe city of New York, machinist, have invented a new and usefulimprovement. in hand printing-presses by which the friction in taking animpression is lessened. and the power applied in a manner more directand eficient than heretofore; and I do hereby declare that the followingis a full and' eX- act description thereof, reference being had to thedrawings, which accompany and make a part of this specification. t

The castings or other frame of this press may be made, and put togetherof the usual modes of the bed, the round, the platen, and other partsmay also be constructed in any of the known ways that are suitable tosuch process, my invention relating solely to the arrangement of theapparatus by which the power of the lever is communicated to the togglejoints or knees by which the platen is moved up and down.

Figure 1, in the drawings is a side view of the press, and Fig. 2, afront view thereof. In these figures however, but little of thepeculiarity of its construction'is shown, this being principallyrepresented in Figs. E3, and l, which gives a view of the upper side ofthe platen, and the curvilinear piece with the toggle joints, or kneesto be presently described.

In all of these figures the parts which correspond are designated by thesame letters of reference.

A, Fig. 3, is an iron plate which extends across from one side or checkof the press to the other where it is firmly attached.

B, is an opening through this plate within which the knees or togglejoints work.

C, is a horizontal segment of the upper segment of the joint.

D, is a piece which forms a part o f the lower segment of the knee oftoggle joint, being a continuation thereof upward from one side thereofso as to rise above the Vrule joint by which they are connected, and toreceive the action of the piece E, which is jointed to the lever orarbor of the press in such a situation, and as compels it to advance bythe pull in a direct or straight line, or very nearly so during itswhole action, the mannervin which this rises from the'lower knee isshown more directly in Fig. 6, it being a detached drawing of the lowerknee. `The lever is so formed as Lto admit the .joint pins G, H, top-ass through it at a distance of three or four inches apart a lineconnecting their centers forming a right angle, or nearly so with theline of the lever. The straps I, connected to the lever by thepin II,works at its other end, on a pin J, passing also through K, a piecefirmly attached t0 thejplate A, and to thev side of the press. A secondstrap corresponding with J, seen at J1, Fig. 2, is placed under thelever, the same joint pin passing through both. A part of the plate A,is to serve as a fulcrum or bearing against which the lever works insuch a way that its points of bearingis continually changing. Thus L, ismade a curvilinear, and has within it cogs or teeth, one of which isseen at M, and into these teeth there gears a segment pinion N, securelyfastened upon the'lower side of the lever, thus forming the progressivefulcrum above mentioned. The position of the lever is shown in thedrawing, Fig. 3, is that in which it stands when the platen is raised toits greatest height, and when forced completely down, J, I-I, and G,will be in a straight line, or nearly so, and by the arrangement hereinshown the piece E, which acts against the toggle joint will during thewhole progress of the pull move in a straight line, or nearly so, andwill consequently convey the power of the lever in the act of taking animpression with less loss, than is encountered in processes made uponany of the plans heretofore known.

These parts are more distinctly shown iny Fig. 4, which is a detacheddrawing of the plate A, and the segment pinion N.

L, is a portion of the part formed curvilinear, and embraces theprinciple of the epicycloid in which a small circle is made to rollalong the inside of a large one. The dotted lines represent one of thestraps I, which retain the segment N, in its place, and by turning onthe joint pins I, H, compels the teeth always to come in contact. Thelever is firmly secured on the upper side of the pinion N, as shown inFig. 3, and by moving back, and forward will cause the different teethto engage, and thus form and through them it is communicated to thevertical toggle joints or knees, and thereby much increasing the powerof the press.

What I claim as my invention, and wish to secure by Letters Patent isoThe particular arrangement of the part conveyin the power of the lever,to the toggle joint or knees, in which a pinion is geared into teeth soas to form a rogressive fulcrum for the purpose, and su st-antially inthe manner herein set forth, notl including however by this description,and claim to limit myself in the construction and arrangement of theparts precisely to the form and manner given, but to vary the same as Imay think proper while the same end is attained by analogous means.

FREDERICK J. AUSTIN.

Witnesses GEORGE BRAD), ROBERT GooLE.

